Exchange online SMTP Replied email address replaced with @www.domain.com

asked 2022-12-27T00:10:03.427+00:00
Eaven Huang 1,686 Reputation points

Dear Experts,

We have quite a number of users who used Linux system and configured our domain mailbox there. Recently we received quite some complaints mentioning when others replied to their email message, the target recipient address got changed, correctly it should be username@keyman .com, however when they replied, it was replied to username@www .domain.com.

Any idea what might have gone wrong with this? It was not one single case so I think it's worth digging deeper to see what's going on.

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